Tooth connection for excavating implements



Patented Sept, 8, 192.5.

UNITED vsTaTEs 1,553,096 PATENT OFFICE.

WALTER J'. MULLALLY, 0F" CHICAGO HEIGHTS, ILLINOIS, ASSIG-NOR T0AMERICAN MANGANESE STEEL COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATIONOFMAINE.

TOOTH CONNECTION Fon ExcAvATING AIMPLmurmurs.

Application led September 10, 1923. SerialI No. 661,798.

To all whom 'it may concer/n:

Beit known that I, WALTER J. MULLALLY, a citizen of the United States,residing at Chicago Heights, in the county of Cook vand State ofIllinois, have invented certain new and useful Improvements in ToothConnections for Excavating Implements, of which the following is aspecification.

This invention relates to toothed excavating implements, such, forinstance, as

dredger buckets, or the like. and has for its object to provide improvedmeans through which to mount the tooth upon the toothsupporting bodyofthe implement. It has heretofore `been the practice to mount thepenetrating member upon the body member by introducing the body memberbetween the tforked tan of the tooth, and then passing bolts t rough thetangs of the' eral y engage the tooth point to prevent dis' placement.But these structures have generally been expensive to finish withsuicient accuracyto develop a proper `fit between the tangs and thebody, portion, es-

- pecially `where the body 'portion is afforded bythe forward lip of theexcavating recep.

tacle. lThe present invention solves the problem by providing the bodymember with substantially smooth and uninterrupted surfaces, which canhe readily finished with suicient accuracy to insure yproper fit .-ofthe jaws or tangs of the'point member;

that is to say, without being interru ted b longitudinal grooves,lateral shoul ers, or the like, for confinement of the tangs laterally;and has on its upper and lower faces, in rear of the portion Vwhich.receives the point, swells or enlargements in which are formed, foreach tooth 4point a socket or sockets in` position to lreceive thoseportions of the tan of the point memberwhich lie inwardl eyond thesecuring bolts', in the longitu 'nally sliding movement, by' which thepoint and bodyv projection are assembled, and having the inner end of atang, reduced' in thickness and so fitted in its socket as to be heldsnuglyl to the face of the body projection, and prevented from liftingor deflecting therefrom under any load which the tooth is designed toencounter in service.

In order that the invention may be fully understood, ,the preferredembodiment thereof is illustrated in the accompanying drawings, in whichl Figure 1 is a vertical longitudinal section of a portion of thetooth-supportingmember of a dredger bucket or similar implement to whicha tooth is applied in accord` ance with the present invention; and

Figure 2 is a plan view of the same.l

1 represents the tooth-receiving member of a dredger bucket or otherexcavating implement. 2 represents one of the teeth mounted thereon forthe purpose of increasing its capacity for enetrating material againstwhich vthe im lement is u'sed. The tooth 2 isitted to bo y 1 throughmeans of socket 3 provided by bifurcating the tooth 2 and the projection4 which enters. said socket; the tangs 5 of the tooth, developed by suchbifurcation, being secured in their overlapped relation upon theprojection 4, by means of one or more bolts 6. The construction as thusfar described is known in im lements of the type referred to, but in succonstruction, an extreme load imposed transversely upon the tooth 2 inuse, exercises such a severe rocking moment of the tooth u` on theprojection 4, for instance at about t e point X, Figure l, as a fulcrum,that it tends to strip the bolts 6` and raise the inner end 5 away fromthe projection 4 upon which it is fitted, with the result that the toothis put out of action long before its. allotted eriod yof wearhas'elPSCd.

Acco ing'to the presentfinvention, the 'l v.

uplper andlolwer surfaces'f `the body 1 w ich lreceive the. boltedportionsof the L tangs 5 are smooth and uninterru tedpvby 100longitudinal channels Y or other toot -securing means so that the `maybe finished with accuracy, at reasonab e expense, to'insure an accuratelit ofthe tooth point on the ybody member; but in rear of these surfacesthe 105 lower tank y5; and into these sockets project 110 the rear endsof the tangs 5 in a manner to hold them firmly upon the body member, andresist stresses tending to distort the attaching tangs, with a leveragemeasured by the distance between the inner end of the tang and thefulcruming point indicated by the reference character X in Figure 1. Thesockets 7 are preferably continued in the direction of their length,until they emerge at receding surfaces of the body member 1, as by sodoing it is more convenient to core them in casting the body member, andeasier to clear the opening in finishing the casting. The portions ofthe tangs 5 which enter the sockets 7 and 7a are reduced in thickness,being, for instance, continuations of those portions of the tangs whichconstitute the bottoms of the grooves which receive the heads and nutsof securing bolts 6, and this leaves shoulders at the side walls of saidrooves. The sockets 7 and 7av are formed 1n swells or enlarge-ments onthe body portion which stand up from the general lane of the smoothportion of the body member in a manner to form abrupt shoulders opposingthe shoulders on the tangs.

I claim:

l'. In an excavating implement, a bifurcated tooth having an attachingtang, and a body portion constructed to enter the bifurcated portion ofsaid tooth and having a substantially smooth and continuous surfacethrough which it receives said tang; said body .portion having in rearof said surface and rising therefrom, aswell or enlargement constructedwith a socket in line with said surface and adapted tol receive theinner end of said tang.

2. In an excavating implement, a bifurcated tooth constructed with anattaching tang, and a body member adapted to enter 3. In an excavatingimplement, a bifurcated tooth constructed with an attaching tang, and abody member adapted to enter the bifurcated portion of said tooth andhaving a substantially continuous and uninterrupted surface throughwhich it receives said tang; said body portion having in rear of saidsurface anupstanding enlargement providing a shoulder beyond saidsurface and constructed with a socket in said enlargement in line withsaid surface and adapted to receive the rear end of the tang; said tanghaving a shoulder opposed to the shoulder provided by said enlargement.

Signed at Chicago Heights, Illinois, this 28th day of Aug. 1923.

' WALTER J. MULLALLY.

